function [depth] = calcdepth(plust,v1rec,v2rec)
% depth = calcdepth(plust,v1rec,v2rec)
%
% Depth calculation using the Plus Time and the layer velocities at each
% receiver location.
%
% Store all the information concerning the Depth values in a matrix of 4 rows
%
% row 1	: receiver coordinates
% row 2	: average Depth values
% row 3	: fold of the Depth values
%
% NOTE: This SOFTWARE may be used by any individual or corporation for any purpose
% with the exception of re-selling or re-distributing the SOFTWARE.
% By using this software, you are agreeing to the terms detailed in this software's
% Matlab source file.

% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by
% its 'AUTHOR' (identified above) and the CREWES Project.  The CREWES
% project may be contacted via email at:  crewesinfo@crewes.org
%
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) This SOFTWARE may be used by any individual or corporation for any purpose
%    with the exception of re-selling or re-distributing the SOFTWARE.
%
% 2) The AUTHOR and CREWES must be acknowledged in any resulting publications or
%    presentations
%
% 3) This SOFTWARE is provided "as is" with no warranty of any kind
%    either expressed or implied. CREWES makes no warranties or representation
%    as to its accuracy, completeness, or fitness for any purpose. CREWES
%    is under no obligation to provide support of any kind for this SOFTWARE.
%
% 4) CREWES periodically adds, changes, improves or updates this SOFTWARE without
%    notice. New versions will be made available at www.crewes.org .
%
% 5) Use this SOFTWARE at your own risk.
%
% END TERMS OF USE LICENSE

% row 4	: standard deviation of the Depth values
critang=zeros(1,length(v1rec));
depth(1,:) = plust(1,:);
depth(3,:) = plust(3,:);
for n=1:length(v1rec)
	critang(1,n) = asin(v1rec(1,n)/v2rec(1,n));
	depth(2,n) = (plust(2,n)*v1rec(1,n))/(2*cos(critang(1,n)));
	depth(4,n) = (plust(4,n)*v1rec(1,n))/(2*cos(critang(1,n)));
end
PMTsetmenus;